fix(ui): 拖动松手从手指位置平滑契合到目标 tab

- 拖动状态与位置状态分离
- 松手先恢复过渡但保留手指位置，下一帧再吸附到目标 tab，避免从旧位置跳变

dist/custom-tab-bar/index.js

@@ -1 +1 @@
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